One of the most common mistakes exercisers make during strength training is to use momentum. does it mean like moving quickly during the strength training? とはどういう意味ですか?

質問を翻訳

Momentum is a physics principle. If someone is using momentum, they themselves are using less force (energy) to move an object. They are allowing momentum to carry out the force (or action). If a strength trainer is lifting weights above his head, and he gets tired, he may start to swing his arms (using momentum) instead of lifting them because it is easier.